96-Inch Water Transmission Main Relocation Project

The Great Lakes Water Authority (GLWA) operates 816 miles of water transmission main that serves 112 communities in SE Michigan.

A 32 mile, 96-inch water transmission main in the system running north from Oakland County to Lapeer County is the focus of this project. The project involves installing a water transmission main segment along a new route and abandoning approximately 2.5 miles of the existing water transmission main.

GLWA has completed the study phase and preliminary design of this project that included selecting the route for the new, relocated 96-inch water transmission main and the implementation strategy to maintain uninterrupted drinking water service during the tie-in of the new transmission main to the existing transmission main system.

The objectives of this project are to increase reliability of the 96-inch water main that serves multiple communities and over 1 million people, improve access for operation and maintenance, relocate the water main outside of businesses and backyards, coordinate with other area infrastructure projects, and to improve traffic flow and pedestrian safety by making improvements at critical intersections.

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96-Inch Water Transmission Main Project Overview

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Frequently Asked Questions

The relocated 96-inch water transmission main will be constructed in Shelby Township and Rochester Hills in a section of the Macomb Orchard Trail, Dequindre Road and East Avon Road between 24 Mile Road and Hamlin Road. Other permanent isolation valve vaults and temporary project facilities that are required to maintain drinking water services during construction will be installed at various locations in the GLWA service area.

Go to glwater.org/96inchWaterMain to find periodic updates and to sign up for project notifications.

The new, relocated 96-inch water transmission main will be approximately 2.5 miles long and installed in a portion of the Macomb Orchard Trail, Dequindre Road and East Avon Road between 24 Mile Road and Hamlin Road. The new 96-inch water transmission main will be relocated outside the limits of the closed G&H Industrial Landfill, the Detroit Sportsmen’s Congress Gun Club property, and out of residential areas south of 24 Mile Road.

Backup drinking water services will be in place during construction to avoid disruptions to water services.

The following roadway improvements are planned as part of this project. Other nearby roadway improvements in Avon Road and Dequindre Road are also planned by the Road Commission for Oakland County.

    • Roadway widening of Dequindre Road between the Macomb Orchard Trail and 23 Mile Road by adding a center turn lane.
    • A new roundabout at the intersection of 23 Mile Road and Dequindre Road with related pedestrian crossing safety improvements.
    • Roadway widening of East Avon Road by adding a center turn lane.
    • Roadway reconstruction to current standards along Dequindre Road between East Avon Road and Hamlin Road.
    • Intersection improvements at Dequindre Road and School Road by adding left-hand turn lanes.
    • Intersection improvements at Dequindre Road and Hamlin Road by upgrading traffic signaling.

The following impacts to the Macomb Orchard Trail are planned as part of this project.

    • Early in project design, trees were tagged for a tree survey in the Macomb Orchard Trail corridor. The tree survey was conducted to catalogue tree species, size, and condition as a preliminary design activity.
    • The Macomb Orchard Trail will be temporarily closed between 24 Mile Road and Dequindre Road during construction of the 96-inch water transmission main and subsequent trail restoration in the trail corridor. Trail traffic will be temporarily detoured using existing sidewalks along 24 Mile Road and Dequindre Road.
    • The paved portion of the Macomb Orchard Trail will be removed and replaced as part of the 96-inch water transmission main construction restoration.
    • A 30-feet-wide “tree free zone” is planned above the new, relocated 96-inch water transmission main. All trees removed for pipe installation will be replaced at a minimum of 1:1 ratio. Landscaping and hardscaping enhancements are planned for the trail restoration between 24 Mile Road and Dequindre Road.

This project will enhance redundancy of the GLWA water transmission system and increase GLWA’s ability to perform operations and maintenance of the 96-inch water transmission main and its valves and outlets by making it more accessible and resilient. No planned disruption to drinking water services during project construction will occur.

This GLWA water transmission main relocation project is being coordinated with another planned Road Commission for Oakland County (RCOC) roadway improvements project at the intersection of East Avon Road and Dequindre Road. GLWA continues to coordinate with other project stakeholders and agencies to minimize roadway traffic disruptions.

Construction for the first phase of pipe installation is planned to begin in early 2022. Updates to the anticipated construction schedule will be provided as the project progresses.

Construction for this project is anticipated to be completed in 2025. Updates to the anticipated construction schedule will be provided as the project progresses.

Final completion of this project is anticipated to occur in 2027.

GLWA is relocating the 96-inch water transmission main to improve the water transmission system redundancy, resiliency, and operations and maintenance access, enhancing GLWA’s ability to continue providing essential, uninterrupted drinking water to member partner communities.

GLWA is installing additional isolation valves and other valves and outlets along the 96-inch water transmission main to improve redundancy of the water transmission system. The new isolation valves will enhance GLWA’s ability to operate and maintain the 96-inch water transmission main while maintaining uninterrupted drinking water to member partner communities.

This project is a planned GLWA capital improvement project. The selection of the construction contractor for this project is planned to occur in 2021.

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96-Inch Water Transmission Main Relocation Project Registration Updates